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| Henry IV | |
|---|---|
| Duke of Mecklenburg | |
 Henry the Fat | |
| Born | 1417 |
| Died | 9 March 1477 |
| Spouse | Dorothea of Brandenburg |
| House | House of Mecklenburg |
| Father | John IV, Duke of Mecklenburg |
| Mother | Catherine of Saxe-Lauenburg |
Henry IV, Duke of Mecklenburg (1417 – 9 March 1477) was from 1422 to 1477 Duke of Mecklenburg.